US4892950A - Process for the preparation of naphthalene-1,8-dicarboximides - Google Patents
Process for the preparation of naphthalene-1,8-dicarboximides Download PDFInfo
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- US4892950A US4892950A US07/204,468 US20446888A US4892950A US 4892950 A US4892950 A US 4892950A US 20446888 A US20446888 A US 20446888A US 4892950 A US4892950 A US 4892950A
- Authority
- US
- United States
- Prior art keywords
- naphthalene
- process according
- preparation
- dicarboximide
- anhydride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- XJHABGPPCLHLLV-UHFFFAOYSA-N benzo[de]isoquinoline-1,3-dione Chemical class C1=CC(C(=O)NC2=O)=C3C2=CC=CC3=C1 XJHABGPPCLHLLV-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000011541 reaction mixture Substances 0.000 claims abstract description 7
- 239000012736 aqueous medium Substances 0.000 claims abstract description 3
- 150000008064 anhydrides Chemical class 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 2
- 230000020477 pH reduction Effects 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 229910021653 sulphate ion Inorganic materials 0.000 claims 1
- GRSMWKLPSNHDHA-UHFFFAOYSA-N Naphthalic anhydride Chemical compound C1=CC(C(=O)OC2=O)=C3C2=CC=CC3=C1 GRSMWKLPSNHDHA-UHFFFAOYSA-N 0.000 abstract description 11
- 230000007935 neutral effect Effects 0.000 abstract description 9
- 150000003863 ammonium salts Chemical class 0.000 abstract description 6
- 125000001624 naphthyl group Chemical group 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- HRRDCWDFRIJIQZ-UHFFFAOYSA-N naphthalene-1,8-dicarboxylic acid Chemical compound C1=CC(C(O)=O)=C2C(C(=O)O)=CC=CC2=C1 HRRDCWDFRIJIQZ-UHFFFAOYSA-N 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000001117 sulphuric acid Substances 0.000 description 3
- 235000011149 sulphuric acid Nutrition 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- -1 N,N-dimethylamino Chemical group 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 239000001166 ammonium sulphate Substances 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- FVDOBFPYBSDRKH-UHFFFAOYSA-N perylene-3,4,9,10-tetracarboxylic acid Chemical compound C=12C3=CC=C(C(O)=O)C2=C(C(O)=O)C=CC=1C1=CC=C(C(O)=O)C2=C1C3=CC=C2C(=O)O FVDOBFPYBSDRKH-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 101100386054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CYS3 gene Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M bisulphate group Chemical group S([O-])(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- RAABOESOVLLHRU-UHFFFAOYSA-N diazene Chemical compound N=N RAABOESOVLLHRU-UHFFFAOYSA-N 0.000 description 1
- 229910000071 diazene Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- CLYVDMAATCIVBF-UHFFFAOYSA-N pigment red 224 Chemical compound C=12C3=CC=C(C(OC4=O)=O)C2=C4C=CC=1C1=CC=C2C(=O)OC(=O)C4=CC=C3C1=C42 CLYVDMAATCIVBF-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 101150035983 str1 gene Proteins 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D221/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
- C07D221/02—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
- C07D221/04—Ortho- or peri-condensed ring systems
- C07D221/06—Ring systems of three rings
- C07D221/14—Aza-phenalenes, e.g. 1,8-naphthalimide
Definitions
- This invention relates to a process for the preparation of naphthalene-1,8-dicarboximide which is optionally substituted in the naphthalene ring.
- Naphthalene-1,8-dicarboximides are important dyestuff intermediate products.
- unsubstituted naphthalene-1,8-dicarboximide is a valuable intermediate product for the preparation of perylenetetracarboxylic acid diimide, which, in turn, by saponification to give perylenetetracarboxylic dianhydride or directly, constitutes the basis for the synthesis of perylenetetracarboxylic acid pigments.
- naphthalene-1,8-dicarboximide and its derivatives which has been known for a fairly long time starts from naphthalene-1,8-dicarboxylic anhydride, which is reacted in aqueous ammonia. A large excess of ammonia is required in this reaction in order to achieve high yields (see, for example, Chem. Monblatt 1959, page 2432: Abstract of J. allg. Chem. (Russian) 28 (90), 692-695, March 1958).
- the naphthalene-1,8-dicarboxylic anhydride employed it is necessary for the naphthalene-1,8-dicarboxylic anhydride employed to be free from naphthalic acid, since the latter is converted into its diammonium salt, which reacts further only with difficulty.
- naphthalene-1,8-dicarboximide which is optionally substituted in the naphthalene ring
- naphthalene-1,8-dicarboxylic anhydride which is optionally substituted in the naphthalene ring
- an ammonium salt in an aqueous medium at a pH near to the neutral point, preferably a pH of 6.5 to 7.5
- the reaction mixture is then acidified to a pH of 1 to 5, preferably 2.5 to 3.5
- the pH is subsequently again adjusted to a value near to the neutral point, preferably 6.5 to 7.5.
- the quality of the naphthalene-1,8-dicarboxylic anhydride employed is not decisive for the quality and yield of the imide.
- R and R 1 denote hydrogen, alkyl, preferably C 1 -C 4 -alkyl, for example methyl, ethyl, alkoxy, prefer ably C 1 -C 4 -alkoxy, for example methoxy or ethoxy, halogen, preferably chlorine or bromine, N,N-di-alkylamino, preferably N,N-di-C 1 -C-4-alkylamino, for example N,N-dimethylamino or N,N-diethylamino, and nitro.
- naphthalene-1,8-dicarboxylic anhydrides are known from the literature or can be prepared analogously to processes known from the literature.
- the new process is used particularly preferentially for the preparation of unsubstituted naphthalene-1,8-dicarboximide.
- ammonium salts used are the ammonium salts of inorganic and organic acids, for example ammonium chloride, acetate, bisulphate, nitrate and carbonate, and, in particular, ammonium sulphate.
- ammonium salt per mole of anhydride. It is particularly preferable to employ 0.52 to 0.75 mole, very particularly preferably 0.55 to 0.6 mole, of (NH 4 ) 2 SO 4 per mole of anhydride. This corresponds to an excess of ammonia of about 10 to 20%, whereas according to the instructions from Chemisches Monblatt quoted above an excess of ammonia of 200% is required.
- the process according to the invention is preferably carried out within the temperature range from 10° C. to the boiling point of the reaction mixture, particularly preferably at 70° to 100° C.
- An alkali metal hydroxide or alkaline-earth metal hydroxide or a tertiary amine, for example triethylamine, in the form of aqueous solutions or suspensions, is customarily used to adjust the pH of the aqueous reaction mixture composed of anhydride and ammonium salt to a value near to the neutral point.
- the pH is preferably adjusted by means of sodium hydroxide solution.
- a mineral acid prefrably sulphuric acid, is used, in particular, to adjust the pH to a value from 1 to 4.
- An embodiment of the process according to the invention consists in repeating the acidification to pH 1 to 4 and the adjustment of the pH to a value near to the neutral point several times, preferably once, twice or three times. This is particularly advisable if the anhydride employed is of an inferior quality, for example contaminated with naphthalic acid.
- reaction mixture is worked up in a customary manner, for example by filtration with suction, washing until neutral and drying.
- Naphthalene-1,8-dicarboximides are obtained by the process according to the invention in a very high quality and in very high yields.
- the following examples serve to illustrate the invention; parts denote parts by weight and percentages denote percentages by weight.
- the pH is then adjusted to 3.0 by the dropwise addition of approximately 27 parts of 78% strength sulphuric acid, and the mixture is stirred for 30 minutes at 90° C.
- a further 40 parts of 50% strength sodium hydroxide solution are then added dropwise in the course of 30 minutes in order to adjust the pH again to a value of 6.5 to 7.5.
- naphthalic anhydride 96.2% pure +0.9% of naphthalene-1,8-dicarboxylic acid
- the pH is adjusted to a value of 3.0 with sulphuric acid for a second time and then to a value of 6.5 to 7.5 with 50% strength sodium hydroxide solution.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicinal Preparation (AREA)
- Other In-Based Heterocyclic Compounds (AREA)
Abstract
Process for the preparation of naphthalene-1,8-dicarboximide which is optionally substituted in the naphthalene ring, characterized in that naphthalene-1,8-dicarboxylic anhydride which is optionally substituted in the naphthalene ring is reacted with an ammonium salt in an aqueous medium at a pH near to the neutral point, the reaction mixture is then acidified to a pH of 1 to 4 and the pH is subsequently adjusted to a value near to the neutral point.
Description
This invention relates to a process for the preparation of naphthalene-1,8-dicarboximide which is optionally substituted in the naphthalene ring.
Naphthalene-1,8-dicarboximides are important dyestuff intermediate products. In particular, unsubstituted naphthalene-1,8-dicarboximide is a valuable intermediate product for the preparation of perylenetetracarboxylic acid diimide, which, in turn, by saponification to give perylenetetracarboxylic dianhydride or directly, constitutes the basis for the synthesis of perylenetetracarboxylic acid pigments.
A process for the preparation of naphthalene-1,8-dicarboximide and its derivatives which has been known for a fairly long time starts from naphthalene-1,8-dicarboxylic anhydride, which is reacted in aqueous ammonia. A large excess of ammonia is required in this reaction in order to achieve high yields (see, for example, Chem. Zentralblatt 1959, page 2432: Abstract of J. allg. Chem. (Russian) 28 (90), 692-695, March 1958). In addition it is necessary for the naphthalene-1,8-dicarboxylic anhydride employed to be free from naphthalic acid, since the latter is converted into its diammonium salt, which reacts further only with difficulty.
Another process, in which solid naphthalene-1,8-dicarboxylic anhydride is reacted with gaseous ammonia under pressure at temperatures of 120° C. to 130° C. is described in German Offenlegungsschrift No. 2,137,242. This process can, however, only be carried out with high technical costs.
The process according to the invention for the preparation of naphthalene-1,8-dicarboximide which is optionally substituted in the naphthalene ring is characterized in that naphthalene-1,8-dicarboxylic anhydride which is optionally substituted in the naphthalene ring is reacted with an ammonium salt in an aqueous medium at a pH near to the neutral point, preferably a pH of 6.5 to 7.5, the reaction mixture is then acidified to a pH of 1 to 5, preferably 2.5 to 3.5, and the pH is subsequently again adjusted to a value near to the neutral point, preferably 6.5 to 7.5.
Surprisingly, the quality of the naphthalene-1,8-dicarboxylic anhydride employed is not decisive for the quality and yield of the imide.
The process is used in particular for the preparation of naphthalene-1,8-dicarboximides of the formula ##STR1## in which R and R1 denote hydrogen, alkyl, preferably C1 -C4 -alkyl, for example methyl, ethyl, alkoxy, prefer ably C1 -C4 -alkoxy, for example methoxy or ethoxy, halogen, preferably chlorine or bromine, N,N-di-alkylamino, preferably N,N-di-C1 -C-4-alkylamino, for example N,N-dimethylamino or N,N-diethylamino, and nitro.
The appropriately substituted naphthalene-1,8-dicarboxylic anhydrides or the unsubstituted anhydride are used as starting materials for the preparation of the compounds of the formula I.
These naphthalene-1,8-dicarboxylic anhydrides are known from the literature or can be prepared analogously to processes known from the literature.
The new process is used particularly preferentially for the preparation of unsubstituted naphthalene-1,8-dicarboximide.
The ammonium salts used are the ammonium salts of inorganic and organic acids, for example ammonium chloride, acetate, bisulphate, nitrate and carbonate, and, in particular, ammonium sulphate.
It is preferable to employ 1 to 1.5 equivalents of ammonium salt per mole of anhydride. It is particularly preferable to employ 0.52 to 0.75 mole, very particularly preferably 0.55 to 0.6 mole, of (NH4)2 SO4 per mole of anhydride. This corresponds to an excess of ammonia of about 10 to 20%, whereas according to the instructions from Chemisches Zentralblatt quoted above an excess of ammonia of 200% is required.
The process according to the invention is preferably carried out within the temperature range from 10° C. to the boiling point of the reaction mixture, particularly preferably at 70° to 100° C.
An alkali metal hydroxide or alkaline-earth metal hydroxide or a tertiary amine, for example triethylamine, in the form of aqueous solutions or suspensions, is customarily used to adjust the pH of the aqueous reaction mixture composed of anhydride and ammonium salt to a value near to the neutral point. The pH is preferably adjusted by means of sodium hydroxide solution.
A mineral acid, prefrably sulphuric acid, is used, in particular, to adjust the pH to a value from 1 to 4.
In order to complete the reaction, it is advisable to continue stirring for 0.5 to 3 hours, preferably 1 to 1.5 hours, at the pH near to the neutral point.
An embodiment of the process according to the invention consists in repeating the acidification to pH 1 to 4 and the adjustment of the pH to a value near to the neutral point several times, preferably once, twice or three times. This is particularly advisable if the anhydride employed is of an inferior quality, for example contaminated with naphthalic acid.
The reaction mixture is worked up in a customary manner, for example by filtration with suction, washing until neutral and drying.
Naphthalene-1,8-dicarboximides are obtained by the process according to the invention in a very high quality and in very high yields. The following examples serve to illustrate the invention; parts denote parts by weight and percentages denote percentages by weight.
148.7 parts of naphthalic anhydride (97.6% pure +2.0% of naphthalene-1,8-dicarboxylic acid) and 59.4 parts of ammonium sulphate are introduced into 750 parts of water, and the mixture is heated to 90° C. in the course of approximately 30 minutes. A pH of 3.0 to 3.5 is set up. Approximately 75 parts of 50% strength sodium hydroxide solution are then added dropwise as uniformly as possible in the course of 1 hour, so that the pH rises to 6.5 to 7.5. Stirring is continued for 1 hour at 90° C.
The pH is then adjusted to 3.0 by the dropwise addition of approximately 27 parts of 78% strength sulphuric acid, and the mixture is stirred for 30 minutes at 90° C.
A further 40 parts of 50% strength sodium hydroxide solution are then added dropwise in the course of 30 minutes in order to adjust the pH again to a value of 6.5 to 7.5.
After stirring has been continued for 2 hours at 90° C., the mixture is cooled to 60° C. and the product is filtered off with suction, washed with water until neutral and dried at 100° C.
144.9 parts of naphthalene-1,8-dicarboximide of 99.3% purity are obtained. This corresponds to a yield of pure material of 97.8% of theory.
148.7 parts of naphthalic anhydride (96.2% pure +0.9% of naphthalene-1,8-dicarboxylic acid) are reacted analogously to Example 1. In this case, however, the pH is adjusted to a value of 3.0 with sulphuric acid for a second time and then to a value of 6.5 to 7.5 with 50% strength sodium hydroxide solution.
142.9 parts of naphthalene-1,8-dicarboximide of 98.7% purity are obtained, which corresponds to a yield of pure material of 98% of theory.
The procedure is analogous to that of Example 1, 148.7 parts of naphthalic anhydride (90.4% pure +1.5% of naphthalene-1,8-dicarboxylic acid) being employed. The pH is, however, adjusted to a value of 3.0 and subsequently to a value of 6.5 to 7.5, 3 times in all.
136.4 parts of naphthalene-1,8-dicarboximide of 98.2% purity are obtained. This corresponds to a yield of pure material of 98.2% of theory.
Claims (6)
1. A process for the preparation of a napthalene-1,8-dicarboximide of the formula ##STR2## in which R and R1 denotes hydrogen, alkyl, alkoxy, halogen, N,N-dialkylamino and nitro comprising reacting a napthalene-1,8-dicarboxylic anhydride of the formula ##STR3## with an amonium salt in an aqueous medium at a pH of about 6.5 to 7.5, acidifying the reaction mixture to a pH of 1 to 4 and subsequently adjusting again the pH to a value of about 6.5 to 7.5.
2. Process according to claim 1 wherein the nephthalene-1,8-dicarboxamide is naphthalene-1,8-dicarboximide.
3. A process according to claim 1, wherein the amonium salt is amonium sulphate.
4. Process according to claim 1, wherein 1 to 1.5 equivalents of amonium salt are employed per mole of anhydride.
5. Process according to claim 1, wherein the reaction mixture is acidified to a pH of 2.5 to 3.5.
6. Process according to claim 1, wherein the acidification to pH 1 to 4 and the adjustment of the pH to a value of about 6.5 to 7.5 are repeated several times.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873719850 DE3719850A1 (en) | 1987-06-13 | 1987-06-13 | METHOD FOR PRODUCING NAPHTHALINE-1,8-DICARBONIC ACID IMIDES |
| DE3719850 | 1987-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4892950A true US4892950A (en) | 1990-01-09 |
Family
ID=6329688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/204,468 Expired - Fee Related US4892950A (en) | 1987-06-13 | 1988-06-09 | Process for the preparation of naphthalene-1,8-dicarboximides |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4892950A (en) |
| EP (1) | EP0295488A3 (en) |
| JP (1) | JPS63310869A (en) |
| DE (1) | DE3719850A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076831A (en) * | 1989-11-29 | 1991-12-31 | Basf Aktiengesellschaft | 1,8-napthalenedicarboximides as antidotes |
| US6372910B1 (en) | 2000-02-28 | 2002-04-16 | Sun Chemical Corporation | Process for the manufacture of 1,8-naphthalimide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929771A (en) * | 1973-05-09 | 1975-12-30 | Ici Ltd | New reactive dyestuffs |
| US4007192A (en) * | 1972-09-20 | 1977-02-08 | Hoechst Aktiengesellschaft | Naphthalimide-4,5-dicarboxylic acids |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3524808A1 (en) * | 1985-07-11 | 1987-01-15 | Ciba Geigy Ag | METHOD FOR PRODUCING N-ALKYL- OR N-ARYLSULPHONYLOXYNAPHTHALIMIDES |
-
1987
- 1987-06-13 DE DE19873719850 patent/DE3719850A1/en not_active Withdrawn
-
1988
- 1988-05-31 EP EP88108644A patent/EP0295488A3/en not_active Withdrawn
- 1988-06-06 JP JP63137597A patent/JPS63310869A/en active Pending
- 1988-06-09 US US07/204,468 patent/US4892950A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4007192A (en) * | 1972-09-20 | 1977-02-08 | Hoechst Aktiengesellschaft | Naphthalimide-4,5-dicarboxylic acids |
| US3929771A (en) * | 1973-05-09 | 1975-12-30 | Ici Ltd | New reactive dyestuffs |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076831A (en) * | 1989-11-29 | 1991-12-31 | Basf Aktiengesellschaft | 1,8-napthalenedicarboximides as antidotes |
| US6372910B1 (en) | 2000-02-28 | 2002-04-16 | Sun Chemical Corporation | Process for the manufacture of 1,8-naphthalimide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63310869A (en) | 1988-12-19 |
| EP0295488A3 (en) | 1990-03-28 |
| DE3719850A1 (en) | 1988-12-22 |
| EP0295488A2 (en) | 1988-12-21 |
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